The lamp is very bright even in the weakest mode, so be careful that you do not light up in his eyes (I still have a spot in the image ^^), is, as promised, brighter still a lot.
The Bedinung is self-explanatory: you press the button on the side in order to adjust the brightness (Low -> Medium -> High -> Turbo (changes due to the heat generated by the power LED after 30 minutes to "High") press Long. changes in the first strobe and then in the SOS mode.
I put the lamp in the lighting state in the bathtub, after 30 minutes was still all right, what happens in a long time under water, therefore I can not say, since even 30 minutes are given. But I'm sure that they would stand it any longer.
The included holster, which is very important to me, the lamp stops in any position, so it can not fall out.
Anyone who wants to use the lamp for police intervention, emergency services or security services, for which they, incidentally, in my eyes because of the quality while compactness ('ne thick Maglite or Two brothers can indeed still have in addition, those who need it) is very well suited to being recommended pick , a tactical holster, like a "ESP LHU" (Size 2 ranges) for 20-30 buy it.
Also highly recommended are 18650 batteries (you only need one, because they are twice as long as the batteries), where you should but do not pay attention primarily on the mAh, but on the manufacturer. 4 mAh are not always equal 4 mAh !! Personally, I have let my "Panasonic NCR18650B_X2 Li-Ion battery (3.7V, 3400mAh, 2-pack)", thus always equal a spare battery with have, mitliefern from the same dealer. What are good, I'm going to review for use in the respective items as well.
The only thing to complain about, is that with the batteries, which further is not bad but why I disregard them, but deduct an entire star. I find the lamp very well, of course, will update when there are problems in operation or it goes very quickly broken. From the first impression I give definitely 5/5 stars!